Portion of a sandal



FIG. 1 is a top plan view of a portion of a sandal according to the present design;

FIG. 2 is a medial side elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a lateral side elevational view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a portion of a sandal, as shown and described. 